I was listening to a podcast the other day and they were discussing where the term "barbecue" came from, but they then also when on to talk about the different definitions of what a bbq really is, usually regional. For example, bbq is ONLY consider bbq if: it's pork only, or has to be slathered in is sauce, has NO sauce, or is cooked slow on in-direct heat, hot and fast, burgers and dogs only, or any umpteen possibilities. This isn't meant to become a debate as to what is the "correct" way to bbq.
Not to mention the definition of "grilling" which would be the topic for another thread. :) (In England, grilling is broiling in the oven.)
For me, I'm easy. BBQ is any form of cooking over and open flame, in-direct or direct. If it's an open flame, it's bbq to me.
How about for you?